223561642 has 4 divisors (see below), whose sum is σ = 335342466. Its totient is φ = 111780820.

The previous prime is 223561589. The next prime is 223561651. The reversal of 223561642 is 246165322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 223532401 + 29241 = 14951^2 + 171^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55890409 + ... + 55890412.

Almost surely, 2^223561642 is an apocalyptic number.

223561642 is a deficient number, since it is larger than the sum of its proper divisors (111780824).

223561642 is a wasteful number, since it uses less digits than its factorization.

223561642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111780823.

The product of its digits is 17280, while the sum is 31.

The square root of 223561642 is about 14951.9778624769. The cubic root of 223561642 is about 606.9213710646.

The spelling of 223561642 in words is "two hundred twenty-three million, five hundred sixty-one thousand, six hundred forty-two".